Stamping machine with sheetfeeding attachment



May 11, 1954 w. A. KARSOE 2,678,016

STAMPING MACHINE WITH SHEET-FEEDING ATTACHMENT Filed Dec. 19, 1949 2Sheets-Sheet 1 {2:511:33 R I k 1 L x; 5 M1 o 1 s *3 INVENTOR W/LLART A.KARSOE BY 9 ATTORNEYS May 11, 1954 w. A. KARSOE 2,678,016

STAMPING MACHINE WITH SHEET-FEEDING ATTACHMENT Filed Dec. 19, 1949 2Sheets-Sheet 2 INVENTOR W/ZLART A. KARSOE K /1.4M ATTORNEYS Patented May11, 1954 UNITED STATES PATENT OFFICE STAMPING MACHINE WITH SHEET-FEEDING ATTACHMENT 1 1 Claim.

This invention relates to a sheet supporting rack for stamping machines.

An object of this invention is to provide a supporting racl; s ructurefor sheet metal being fed to a stamping machine which will support theblank. sheet in the plane of the lower die, the rack. structureincluding an adjustable guide means for the sheet.

Another object of this invention is to provide a rack structure of thislrind which includes means whereby extension members may be added to thestructure for supporting wide sheets.

A further object of this invention is to provide a rack structure forstamping machines which can be detachably secured to the machine, andincludes an extensible and collapsible buter leg for supporting theouter end of the rack.

With the above and other objects in View, my invention consists in thearrangement, combination and details of construction disclosed in thedrawings and specification, and then more particularly pointed out inthe appended claim.

In the drawings,

Figure l is a detail side elevation, partly broken away and in section,of a sheet metal supporting rack structure for a die stamping machine,con structed according to an embodiment of this invention,

Figure 2 is a plan view of one of the rack mem bers,

Figure 3 is a sectional view, partly broken away, taken on the line 3-3of Figure 2,

Figure 4 is a sectional View taken on the line l-- l of Figure 2,

Figure 5 is a fragmentary sectional view taken on the line 5Ei of Figure2.

Referring to the drawings, the numeral ill designates generally astamping machine of conventional construction, which is provided with alower stationary die member ii, and an upper movable die member it. Thedie member H is carried by a circular plate 13 which is mounted on a bedor supporting plate lil carried by the frame of the machine.

In order to provide a means whereby a sheet of metal may be supportedfor horizontal movement in the plane of the lower die member H, I haveprovided a pair of sheet supporting rack members generally designated asi5 and it.

The rack members it and 16 are of like construction and are mounted atdiametrically opposed points on the plate l3 and extend from oppositesides of the die member H, with the upper surfaces thereof co-planarwith the upper surface of the die member I l. Rack member i5 is (Cl.1l3113) formed of an inner cast body ll, an outer cast body l8, and anintermediate cast body 59. The bodies 5? and it are fixed together bywelding a pair of angle members 2!] to the bodies El and it, and thebodies l8 and it are connected together by means of a pair of outerangle members 23 which are welded to the bodies i8 and id.

The body ll which is the inner body is formed of a top plate 22 having apair of upwardly opening substantially semi-circular boxes 23 formed atthe opposite ends thereof, and the body il includes an inner plate 2dco-planar with the plate 22. The plate 24 is formed at its inner endwith a depending flange 25, and a slide block 26 formed with a V-shapedkeyway 2'! is secured by fastening means 23 to the lower side of theplate 24 and in abutting relation to the flange 25.

A second block 29 is secured by fastening means (it to the lower side ofthe plate 26 outwardly from the block 25, and a guide or key member 3!is adapted to engage between the blocks 26 and 29 for locking the innerend of the rack member iii to the stamping machine it. The key member inis adapted to be secured as by fastening means 32 to the plate It, asshown in Figure 5. When the inner end of the rack member E5 is locked tothe stamping machine it by engagement of the key or lock 31 in thelreyway ii, the inner end of the rack i5 is held against lateralshifting by means of dowel pins 33 or the like, which are extendedthrough the inner end of the rack member l5 and engage in the plate iii.

A sheet guiding member or finger 3 t is mount ed on a shaft 35 whichengages through the block H, and the shaft 35 is formed with polygonalintermediate faces 36, with one of which a set screw 3'! is adapted toengage for holding the shaft 35 against both endwise and rotarymovement. Where a relatively large sheet of metal is engaged on theupper side of the rack l5, one of the guide members 8d may be disposedin upwardly extended position, whereas the opposite guide member 3M atthe opposite end of the shaft 35 may be disposed oppositely from theguide member 36 and seat within one of the boxes or housings 23, asshown in Figure l, according to the position of the shaft 35 to permitthe opposite finger to move to upright position whereby either side ofthe table may be used as a guide regardless of the width of the shaft.

The intermediate body H3 is constructed similar to the inner body ll,being formed with a pair of outer boxes or housings 38 and a guidesupporting shaft 39 engages in the body it and has secured to theopposite ends thereof guides 40 similar to the guides 34 and 34a. BodyI9 also includes a bushing 4I within one end of which a bar or tubularsupporting member 42 is adapted to be secured by a set screw 43 so thatthe rack structure may be laterally extended to provide a suitablesupport for a relatively wide piece of sheet metal.

Body I8 is also constructed similar to body I! and includes a shaft 44having secured to the opposite ends thereof guides 45, with one of theguides engaging within one of the two housings or boxes 46 formed at theopposite sides of the body I8. The body I8 also includes a pair of endbushings 41 within which lengthwise extending bars or tubes 48 areadapted to be secured for extending the length of the support beyond theend of the rack I5. The body I8 has secured to the outer end thereof ablock 49, having a pair of ears 50 between which a connector 5| isrockably mounted. The connector 5| is mounted on a pivot member 52 whichextends through the cars 50, and the connector 5| includes a pair ofears 53.

An extensible leg member generally designated as 54 is pivotally securedto the connector 5i and includes an car 55 secured to the upper end ofan inner leg member 56. The leg member 55 telescopes into a lowertubular leg member 51 and is fixed in vertically adjusted position bymeans of a split clamp 53 which is carried by the upper end of the lowerleg member 51.

A clamping screw 59 is carried by the clamp 58 and has an elongatedhandle 60 secured thereto so that the screw or bolt 59 may beconveniently rotated to either a clamping or released position.

The plate 24 at the forward end of the plate 22 has secured to theopposite sides thereof, depending flanges iiI which are adapted toengage at the opposite ends of the key or look 3I to thereby hold therack member I5 against lateral movement. The dowel pins 33 not onlyprovide a means for holding the inner end of the rack member I5 againstlateral movement, but also provide a means whereby the rack member I5will be disposed in a horizontal plane.

In the use of this rack structure, the key members or looks 3| aresecured to the plate or head I3 in parallel relation on opposite sidesof the die II. Each rack structure is engaged with the key or lock 3I byplacing the slide block 26 inwardly of the key member 3| and in anoverlaid position relative thereto. The outer end of the rack I5 is thenraised to allow the keyway 21 to align with the key member 3I, and therack I5 is moved outwardly with the keeper or keyway block 26 slidingonto the key member 3|. The outer end of the rack I5 is graduallylowered as the rack is moved outwardly and downwardly into engagementwith the lock or key 3I, and the extensible supporting leg 54 is thenadjusted so that the rack structure I5 is in a true horizontal positionco-planar with the upper side of the lower die I I.

With a rack structure as hereinbefore described, a firm and relativelysolid guiding means is pro vided for the sheet metal which is beingpassed into the stamping machine, and the guides 34, 40 and 45 areaccurately adjustable so that the stamping will take place at thedesired point on the sheet metal. Where the metal is relatively wide orlong, the laterally extendable extension members 42 may be secured tothe rack member I5 or the endwise extending members 48 may be secured tothe outer end of the rack member I5. This rack structure provides ameans whereby the rack may be removed and subsequently replaced Withoutchanging the original set position.

I do not mean to confine myself to the exact details of constructionherein disclosed, but claim all variations falling within the purview ofthe appended claim.

What I claim is:

A stamping machine having a lower stationary die, a table having ahorizontal to portion adjacent and at the same level as the top of thedie, a transverse portion forming a channel at a lower level transverseto the direction of the sheet feed to the die, semicircular boxes ateach end of said channel open on their outer sides, a shaft memberhaving a polygonal intermediate section rotatably and slidably mountedin said channel, lock means engaging said section for releasablysecuring said shaft against rotation and transverse movement wherebysaid shaft may be locked in a selected transverse or rotative positionof said shaft, and a single work engaging finger extending radially ateach end of said shaft member, the fingers at opposite ends extending indiametrically opposite directions, said fingers being of a lengthsubstantially equal to the radius of said boxes, whereby one of saidfingers may seat in a box when the other is vertically upright.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 348,462 Hall Aug. 31, 1886 440,969 Smith Nov. 18, 1890 664,148Herpel Dec. 18, 1900 723,383 Harben Mar. 24, 1903 743,650 Mancha Nov.10, 1903 751,121 Tidey Feb. 2, 1904 1,029,159 Westerbeck June 11, 19121,031,605 Wing July 2, 1912 1,066,528 Randolph July 8, 1913 1,127,975Elwing Feb. 9, 1915 1,267,379 Cook May 28, 1918 1,460,344 Kager June 26,1923 1,578,855 Schoendelen Mar. 30, 1926 1,940,581 Carter Dec. 19, 19332,156,015 Greiner Apr. 25, 1939 2,495,275 Miller Jan. 24, 1950 2,500,196Metzner Mar. 14, 1950 2,579,922 Goldsworthy Dec. 25, 1951

